کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5368164 | 1388385 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Excitation of high energy levels under laser exposure of suspensions of nanoparticles in liquids Excitation of high energy levels under laser exposure of suspensions of nanoparticles in liquids](/preview/png/5368164.png)
Laser exposure of suspensions of nanoparticles in liquids leads to excitation of high energy levels in both liquid and nanoparticle material. The emission spectrum of the colloidal solution under exposure of a suspension metallic nanoparticles in water to radiation of a Nd:YAG laser of a picosecond range of pulse duration is discussed. Excitation of nuclear energy levels and neutron release is experimentally studied on the model system of transmutation of Hg into Au that occurs under exposure of Hg nanodrops suspended in D2O. The proposed mechanism involves: (i) emission of X-ray photons by Hg nanoparticles upon laser exposure, leading to neutron release from D2O, (ii) initiation of Hg â Au transmutation by the capture of neutrons. The effect of transmutation is more pronounced using 196Hg isotope instead of Hg of natural isotope composition. The influence of laser pulse duration on the degree of transmutation (from fs through ns range) is discussed.
Journal: Applied Surface Science - Volume 254, Issue 4, 15 December 2007, Pages 1022-1026